1、Do you know the answer____ the question.
题目
1、Do you know the answer____ the question.
A to B of C at D in
2、Thank you _____me.
A for help B for helping C at helping D to help
3、Go _____the street and turn left _____the second crossing.
A long at B away to C along at D along to
答案
a question和key要用to
b thank you for + ving
c crossing用at
举一反三
已知函数f（x）=x，g（x）=alnx，a∈R．若曲线y=f（x）与曲线y=g（x）相交，且在交点处有相同的切线，求a的值和该切线方程．
我想写一篇关于奥巴马的演讲的文章,写哪一篇好呢?为什么好
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